JP3495929B2 - Power supply device for compressor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for a compressor which is connected to a power supply terminal of a terminal block provided on the outer surface of a compressor to supply power and which can detect the outer surface temperature of the compressor.

[0002]

2. Description of the Related Art FIG. 11 shows a conventional compressor power supply device used in, for example, a refrigerator compressor. In FIG. 11, a rectangular box-shaped terminal box 2 having front and bottom surfaces opened is attached to the side surface of the compressor 1. A circular hole 3 and a rectangular hole 4 are arranged vertically on the compressor mounting surface of the terminal box 2, and the circular terminal block is arranged on the side surface of the compressor 1 in a slightly raised state. 5 faces the inside of the terminal box 2 through the circular hole 3. A 3-core terminal (not shown) is projectingly provided on the terminal block 5, and a power supply connector (hereinafter, referred to as a cluster) 6 is fitted to the 3-core terminal to connect to a compressor motor (not shown). It is designed to supply three-phase AC power from an inverter power supply.
Further, a temperature detecting element configured by disposing a bimetal in a metal cylindrical case (hereinafter referred to as a bimetal element)
7 is pressed and fixed by a pressing spring 8 so that one end surface (heat-sensitive surface) of the cylindrical case is in contact with the side surface of the compressor 1 through the rectangular hole 4.

The three lead wires 9 drawn out from the cluster 6 and the two lead wires 11 connected to both terminals of the bimetal element 7 by the faston terminals 10 are wound with a heat resistant tape 12 and then the terminal box. 2 is led out from the lower surface opening. Further, this terminal box 2 is covered with a rectangular box-shaped terminal cover 13 made of a flame-retardant member having an opening for the purpose of protecting the charging part and preventing water, foreign matter, etc. from adhering to the charging part. ing. The terminal cover 13 is fixed to the terminal box 2 by engaging both ends of the cover pressing spring 14 with the engaging holes 2a of the terminal box 2 to prevent the terminal cover 13 from falling off.

FIG. 12 shows a vertical sectional view (a) and a horizontal sectional view (b) of the bimetal element 7. This Figure 1
In FIG. 2 (a), from the opening (upper part) of the case 7a in the shape of a bottomed container having a circular shape, a thick inner lid 7b having a substantially circular shape and protruding downward is inserted, and the inner lid 7b thereof is inserted. A guide pin 7c extending in the up-down direction in the case 7a is provided in the insertion hole provided at the center of the case so that the guide pin 7c can be inserted therethrough. The upper opening surface of the case 7a is covered with an aluminum cap 7d. The upper part of the case 7a is located close to the lower surface of the cap 7d and between the cap 7d and the upper end surface of the guide pin 7c. The circular plate-shaped bimetal plate 7e (so-called snap action bimetal) is arranged in a warped state so as to be convex upward at room temperature.

At the bottom of the case 7a, two terminals 7f,
7g is fixed by rivets 7h and 7i, and these terminals 7f and 7g are electrically connected to a movable contact and a fixed contact (neither shown) provided in the case 7a through the rivets 7h and 7i, respectively. ing. A contact spring 7 is located at the bottom of the case 7a and below the guide pin 7c to urge the movable contact toward the fixed contact.
j is provided.

In the above structure, the outer surface of the cap 7d of the bimetal element 7 serves as a heat-sensitive surface, and the outer surface temperature of the compressor 1 can be detected with the heat-sensitive surface being in contact with the side surface of the compressor 1. In this case, when the temperature of the heat-sensitive surface is lower than the predetermined operating temperature, the bimetal plate 7e is warped upward as shown in FIG. The movable contact does not push the pin 7c downward, and the movable contact is the contact spring 7j.
It is in contact with the fixed contact by the biasing force of. On the other hand, when the temperature of the heat-sensitive surface is equal to or higher than the operating temperature, the bimetal plate 7e reverses to a downward convex warp state, and the central portion of the bimetal plate 7e pushes down the guide pin 7c. 7j is pushed downward and the movable contact separates from the fixed contact.

[0007]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Bimetal plate 7e
Is in a state of being housed in a space sandwiched between the lower surface of the cap 7d and the upper surface of the inner lid 7b, and the inner peripheral surface of the case 7a and the bimetal plate are protected so that the reversing operation of the bimetal plate 7e is not hindered. A slight gap is provided between the outer peripheral edge of 7e (see FIG. 12 (b)). That is, when the bimetal plate 7e is bent upward in a convex shape, the bimetal plate 7e is arranged in the storage space in a freely movable state within a range regulated by the upper end surface of the guide pin 7c.

Therefore, when the compressor 1 is operated with the bimetal element 7 attached to the compressor 1, the vibration of the compressor 1 causes the bimetal plate 7e to vibrate, so that the bimetal plate 7e is placed on the lower surface of the cap 7d or inside the case 7a. There was a problem that an abnormal noise was generated by hitting the peripheral surface.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a compressor power supply device capable of preventing abnormal noise generated from a bimetal element during operation of the compressor.

[0010]

In order to achieve the above-mentioned object, the power supply device for a compressor of the present invention described in claim 1 is formed in the shape of a bottomed container having an opening, and the opening is provided to the compressor. A terminal cover attached so that the parts are closed, and a heat-sensitive surface is formed in the vicinity of the bimetal plate, and is held in the terminal cover so that the heat-sensitive surface faces the outer surface of the compressor. And a bimetal element that is housed in the terminal cover,
A power supply connector for a compressor, comprising: a power supply connector that is electrically connected to a power supply terminal provided on a terminal block of the compressor when the terminal cover is attached to the compressor; An anti-vibration magnet that is fixed in a position sandwiched between the heat-sensitive surface of the bimetal element and the outer surface of the compressor with the terminal cover holding the element attached to the compressor is provided. Characterize.

According to this structure, when the compressor power supply device is assembled to the compressor,
Since the magnetic attraction force of the vibration-proof magnet in the fixed state acts on the bimetal plate inside the bimetal element via the heat sensitive surface of the bimetal element, the bimetal plate is regulated to be pressed to the heat sensitive surface side. As a result, even if the compressor is operated and its vibration is applied to the bimetal element, the bimetal plate does not separate from the heat-sensitive surface (the surface on the inner side of the bimetal element), and the bimetal plate makes an abnormal noise. Can be prevented. In addition, the frictional force that acts when the bimetal plate comes into contact with the heat-sensitive surface also suppresses the movement of the bimetal plate in the direction along the heat-sensitive surface, so that the peripheral edge of the bimetal plate and the inner peripheral surface of the case of the bimetal element hit. The sound can be prevented.

In this case, it is desirable that the anti-vibration magnet is arranged in close contact with the heat-sensitive surface of the bimetal element (claim 2). According to this structure, the anti-vibration magnet and the bimetal plate inside the bimetal element approach each other, and a larger magnetic attraction force acts on the bimetal plate. As a result, the bimetal plate is pressed against the heat-sensitive surface side with a greater force, and it is possible to more reliably prevent generation of abnormal noise from the bimetal plate due to vibration of the compressor.

Further, it is desirable that the thickness dimension of the anti-vibration magnet is set to be substantially equal to the dimension of the gap between the heat-sensitive surface of the bimetal element and the outer surface of the compressor (claim 3). According to this configuration, the distance between the anti-vibration magnet and the bimetal plate inside the bimetal element is small even when the antivibration magnet is located on the outer surface side of the compressor instead of on the heat-sensitive surface side of the bimetal element. Therefore, a sufficient magnetic attraction force can be applied to the bimetal plate to regulate the bimetal plate toward the heat sensitive surface.

Further, if the vibration isolating magnet is constituted by a rubber magnet (claim 4), it is possible to prevent the vibration isolating magnet from vibrating along with the operation of the compressor and hitting a protrusion existing on the outer surface of the compressor to be damaged. be able to. Further, even if the anti-vibration magnet is damaged, it is possible to avoid a situation where the heat-sensitive surface of the bimetal element is deformed by the fragments and the operating temperature changes.

In the above case, it is preferable that the anti-vibration magnet is composed of a single-sided magnetized magnet having a magnetized surface which is in contact with the heat-sensitive surface of the bimetal element. According to this configuration, a magnetic attraction force acts between the anti-vibration magnet and the bimetal plate of the bimetal element, while a magnetic attraction force acts between the anti-vibration magnet and the outer surface (for example, iron) of the compressor. It almost does not work. As a result, the anti-vibration magnet is always in close contact with the heat-sensitive surface of the bimetal element, and the bimetal plate is restricted to the heat-sensitive surface by a large magnetic attraction force. As a result, the effect of suppressing abnormal noise can always be maintained in a large state.

In this case, the magnetized surface and the non-magnetized surface of the anti-vibration magnet may be colored in different colors (claim 6), or a double-sided tape may be attached to the magnetized surface (claim 7). At the time of assembling the compressor power supply device to the compressor, the magnetized surface and the non-magnetized surface of the anti-vibration magnet can be easily discriminated from each other, and the risk of assembling them with both surfaces reversed is reduced.

Further, the compressor power supply device of the present invention according to claim 8 is a compressor power supply device comprising the above-mentioned terminal cover, a bimetal element, and a power supply connector, wherein the bimetal element is connected to the terminal. In the state where the cover is attached to the compressor, the heat-sensitive surface is held in the terminal cover so as to be inclined with respect to the vertical plane.

According to this structure, the self-weight of the bimetal plate arranged in parallel with the heat-sensitive surface in the bimetal element causes not only the peripheral portion of the bimetal plate but also the bimetal plate and the heat-sensitive surface (the inner surface of the bimetal element). ) Or a contact point between a bimetal plate and a guide pin provided inside the bimetal element, for example. As a result, the vibration of the bimetal plate is suppressed by the frictional force acting on these contact points during operation of the compressor.
It is possible to suppress the generation of abnormal noise due to vibration.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS. 1 to 9. FIG. 1 is a vertical cross-sectional view showing a state in which a compressor power supply device 21 is attached to a compressor 22 for a refrigerator, for example. A rectangular box-shaped metal terminal box 23 having a front surface and a bottom surface opened is attached to the side surface of the compressor 22 by heat transfer. A circular hole 23a is provided in the compressor mounting surface of the terminal box 23 at a substantially central portion thereof.
A circular terminal block 24, which is arranged in a slightly raised state on the side surface of the, faces the inside of the terminal box 23 through the circular hole 23a. The terminal block 24 has a three-core terminal 25 (a power supply terminal in the present invention) connected to a compressor motor (not shown) housed in the compressor 22.
Is projected. Further, the upper surface of the terminal box 23 is formed so as to be slightly inclined downward from the front edge side thereof toward the compressor attachment surface side. A compressor support frame 29 is fixed to the upper surface of the compressor table 26 installed in the refrigerator machine room by a screw 28 via a vibration-proof rubber 27.
It is designed to be supported and fixed on the upper part of 9.

2 and 3 are a rear view and a perspective view of the compressor power supply device 21, respectively. As shown in FIGS. 1 to 3, the compressor power supply device 21 includes a bottomed container-shaped terminal cover 30 having a rectangular opening.
The bimetal element 31 and the cluster 32 (power supply connector in the present invention) are housed and fixed, and are attached to the terminal box 23 so that the opening of the terminal cover 30 is closed by the terminal box 23.

Further, a side view of the compressor power supply device 21 is shown in FIG. 4, and a front view of the terminal cover 30 is shown in FIG. The terminal cover 30 is formed of a flame-retardant and insulating member, and a portion that becomes an upper surface when attached to the terminal box 23 is from a portion (opening side) that overlaps with an upper surface portion of the terminal box 23. An inclined portion 30a that is inclined obliquely downward to the front surface side (bottom portion side) is formed (see FIG. 1). As shown in FIGS. 2 and 3, the terminal cover 30 is provided on the lower side wall of the terminal cover 30.
Is provided with a slit 30b for inserting a lead wire extending from the bottom to the opening. Then, as shown in FIG.
The bottom edge of the terminal cover 30 is provided with a semicircular wiring lead-out hole 30c continuous with the slit 30b, and the wiring lead-out hole 30c is provided on the bottom of the terminal cover 30.
The drip-proof cover 30d is integrally formed so as to cover it from the upper surface side.

Grooves 30e extending from the bottom to the openings are formed on both outer side surfaces of the terminal cover 30, and a guide portion 30g sandwiched by two ridges 30f is formed on the outer bottom surface of the terminal cover 30. It is formed so as to be continuous with the groove 30e (see FIGS. 4 and 5). Further, a claw portion 30q is provided on the opening edge portion of the terminal cover 30 adjacent to the slit 30b. The terminal cover 30 is attached to the terminal box 23 in a state where the claw portion 30q is engaged with the lower end portion of the bottom surface (compressor mounting surface) of the terminal box 23, and the cover pressing spring 33 (having a substantially U-shape) ( 1) is pushed along the groove portion 30e and the guide portion 30g, and bending piece portions (not shown) provided at both end portions of the cover pressing spring 33 are provided on the side surface of the terminal box 23. By engaging with an engaging hole (not shown), the terminal cover 30 is fixed in a state of being fitted inside the terminal box 23.

The bimetal element 31 housed in the terminal cover 30 is a temperature detecting element for detecting the outer surface temperature of the compressor 22 via the terminal box 23. For example, if the compressor 22 continues to operate in a high temperature state due to a failure of a fan motor installed in a refrigerator machine room, insulation deterioration occurs in oil inside the compressor 22 and windings of the compressor motor. Therefore, the refrigerator is configured to stop the operation of the compressor 22 at a predetermined temperature or higher by using the bimetal element 31.

The bimetal element 31 has the same structure as the bimetal element 7 described in [Prior Art]. That is, a bimetal plate 31c (see FIG. 1) is arranged inside a cylindrical case, and one end surface of the cylindrical case is formed as a heat sensitive surface 31a by a cap member made of aluminum. A contact which is opened and closed by reversing the warp of the bimetal plate 31c according to the temperature change is accommodated in the cylindrical case, and the other end surface of the cylindrical case has two terminals 31b connected to the contact. Are opposed to each other with a predetermined interval.

On the heat-sensitive surface 31a of the bimetal element 31, a disk-shaped vibration-proof magnet 38 is attached in close contact with the heat-sensitive surface 31a. The anti-vibration magnet 38 is formed of, for example, a barium ferrite-based rubber magnet. FIG. 7 shows the magnetized state of the anti-vibration magnet 38. The anti-vibration magnet 38 shown in FIG. 7A is a double-sided magnetized type, and one surface thereof is magnetized to the N pole and the other surface is magnetized to the S pole. Also, instead of this, FIG.
The single-sided magnetized type anti-vibration magnet 38a may be used. The magnetized surface of the anti-vibration magnet 38a is magnetized so that N poles and S poles are alternately arranged in the direction along the magnetized surface. The magnetic forces of the anti-vibration magnets 38, 38a are set to a magnetic force that does not affect the operating temperature of the bimetal element 31.

On the other hand, the cluster 32 is a connector for fitting with the three-core terminal 25 to supply three-phase AC power from the inverter power source to the compressor motor. As shown in FIG. Three fitting holes 32a are provided corresponding to the terminal arrangement of the three-core terminal 25. And
The three lead wires 37 connected to the receptacle (not shown) inside the fitting hole 32a are drawn out from the lead wire outlet formed at one end (upper part in FIG. 2) of the cluster 32. . Further, the protrusions 3 for engaging and fixing are provided on both sides of the cluster 32 on the side opposite to the lead wire outlet.
2b is integrally provided.

The bimetal element 31 and the cluster 3
The inside of the terminal cover 30 has the following configuration for accommodating and fixing 2. That is, as shown in FIGS. 1 and 2, at the lower corner of the inner bottom portion of the terminal cover 30, a cylindrical base portion 30h for supporting the bimetal element 31 and a base for supporting the cluster 32 are provided. The parts 30i, 30i, 30j, and 30k are integrally formed. Here, the base portions 30i and 30j have the same height for directly supporting the cluster 32,
The base portion 30k is an arm portion 34a of a mounting holder 34 described later.
To support the cluster 32 via the base 3
It is formed to be lower than 0i and 30j by the thickness of the arm portion 34a. In addition, an engaging claw 30m for fixing the cluster 32 is integrally formed in the upper portion of the terminal cover 30,
Two elastically deformable engaging claws 30n for fixing the cluster 32 are also provided at the center of the terminal cover 30.
The clusters 32 are integrally formed in a state of facing each other with an interval substantially equal to the width of the cluster 32.

Next, the procedure for assembling the compressor power supply device 21, that is, the bimetal element 3 in the terminal cover 30.
A procedure for storing and fixing the 1 and the cluster 32 will be described.
Here, as shown in FIG. 6, a mounting holder 34 for fixing the bimetal element 31 is provided with a holding portion 34b having a substantially cylindrical shape, and a supporting plate portion 34g extending downward from the holding portion 34b to a side thereof. And a closing portion 34c provided with a fitting groove 34e. The holding portion 34b has a peripheral portion of the heat sensitive surface 31a when the bimetal element 31 is held. Is provided with a flange portion 34d. In addition, the holding portion 34b,
Notch 34 for facilitating storage of the bimetal element 31
f is provided. Further, the support plate portion 34g is formed with a guide portion 34h facing the arm portion 34a and inclined from the holding portion 34b to the arm portion 34a.

The assembly procedure is as follows. First, fasten terminals 35 with lead wires 36 are fitted to both terminals 31b of bimetal element 31, and lead wires 36 and lead wires 37 (both made of vinyl chloride) drawn out from cluster 32 are connected. Are collectively inserted into the slit 30b. Then, the heat sensitive surface 31a of the bimetal element 31 is brought into contact with the flange portion 34d of the mounting holder 34, so that the bimetal element 31
The base portion 30h between the terminals 31b and the arm portion 3 of the mounting holder 34
4a is placed on the base portion 30k so that the bimetal element 31
Is placed on the top of the base portion 30h.

At this time, in FIG. 3, the mounting holder 34
The fitting groove 34e provided in the closing portion 34c of the slit 3
When the slit 30b is closed while sliding while being fitted to one end surface of the flange 0d, the flange portion 34d is finally obtained.
Is configured so that the upper surface thereof is flush with the terminal box contact surface of the terminal cover 30. As a result, the lead wires 36 and 37 are led out from the terminal cover 30 through the wiring lead-out hole 30c. In this case, the lead wires 36 and 37 drawn out below the terminal cover 30 are
The lower end portion of the closing portion 34c is bent into a U-shape (see FIG. 4), and the frictional force at this bending portion absorbs the tensile force from the outside with respect to the lead wires 36 and 37.

After that, the lead wire 37 of the cluster 32 is made to crawl between the base portions 30i, 30i and the base portions 30j, 30k at the inner bottom portion of the terminal cover 30, and then, as shown in FIG. Regulating wall 3 formed integrally with the
According to 0p, the edge of the cluster 32 on the lead wire outlet side is engaged with the engaging claw 30m. Then, the engaging claw 30
While the two engaging claws 30n are elastically deformed in the expanding direction with m as a fulcrum, the protruding portion 32b side of the cluster 32 is moved along the guide portion 34h formed on the support plate portion 34g toward the bottom portion of the terminal cover 30. By pressing
2b is engaged with the engaging claw 30n. As a result, the lead wire outlet side of the cluster 32 is placed on the top of the base portion 30i, and the protrusion 3 of the cluster 32 is placed on the top of the base portion 30j.
2b is placed, the cluster 32 covers the terminal cover 3
It is fixed within 0. At this time, the arm portion 34a of the mounting holder 34 is provided between the top portion of the base portion 30k and the cluster 32.
Since the cluster 32 is sandwiched, the cluster 32 is fixed and the mounting holder 3 holding the bimetal element 31 is fixed.
4 is also fixed.

After the bimetal element 31 and the cluster 32 are completely housed and fixed in the terminal cover 30, the vibration isolating magnet 38 is brought into close contact with the heat-sensitive surface 31a of the bimetal element 31. At this time, the anti-vibration magnet 38 and the bimetal plate 3 inside the bimetal element 31 are connected via the heat-sensitive surface 31a.
A magnetic attraction force acts on the heat-sensitive surface 1a and the vibration-damping magnet 38 is held in a fixed state in close contact with the heat-sensitive surface 31a. The bimetal plate 31c is also held in a state of being pressed against the heat sensitive surface 31a. It should be noted that the double-sided magnetized anti-vibration magnet 3
In the case of using a single-sided magnetization type vibration-proof magnet 38a instead of No. 8, the magnetization surface is brought into close contact with the heat-sensitive surface 31a.

In the compressor power feeding device 21 thus assembled, the claw portion 30q is engaged with the lower end portion of the compressor mounting surface of the terminal box 23 as described above, and the three-core terminal 25 in the terminal box 23 is While being fitted into the fitting holes 32a of the cluster 32, they are fitted inside the terminal box 23 and then fixed by the cover pressing spring 33. In this assembled state,
A gap between the heat-sensitive surface 31a of the bimetal element 31 and the vibration isolating magnet 38, and the vibration isolating magnet 38 and the terminal box 2
It is desirable that the gap between the outer surface of No. 3 and the outer surface of No. 3 is 0.3 mm or less.

If the contact between the terminal cover 30 and the terminal box 23 is poor, a cushioning material made of, for example, butyl rubber may be inserted into the contact surface in order to prevent hitting noise caused by vibration and to enhance waterproofness. .

According to the above structure, the following actions and effects can be obtained. With the compressor power supply device 21 assembled to the compressor 22, the heat-sensitive surface 31 a of the bimetal element 31 and the terminal box 2
Since the vibration isolating magnet 38 is arranged between the vibration isolating magnet 38 and the outer surface of the bimetal element 3, a magnetic attraction force acts between the vibration isolating magnet 38 and the bimetal plate 31c in the bimetal element 31, and the bimetal plate 31c is heat-sensitive. It is pressed against the surface 31a side. Therefore, even if the compressor 22 is operated and its vibration is transmitted to the bimetal element 31, the bimetal plate 31c which is warped in the direction of the compressor 22 in the direction of the ridge is
It is not separated from a (the surface on the inner side of the bimetal element 31), and it is possible to prevent the occurrence of a clicking noise caused by the bimetal plate 31c hitting the heat-sensitive surface 31a.

The bimetal plate 31c has a heat-sensitive surface 31a.
Due to the frictional force generated when the bimetal plate 31c is pressed to the side, the movement of the bimetal plate 31c in the direction along the heat-sensitive surface 31a is also suppressed, and the hit noise between the peripheral edge of the bimetal plate 31c and the inner peripheral surface of the case of the bimetal element 31 is also small. Become.

FIG. 8 shows the noise measurement results behind the refrigerator during operation of the compressor, with and without the anti-vibration magnet 38. Here, the horizontal axis represents the noise frequency and the vertical axis represents the noise level. Further, the noise level when the vibration isolating magnet 38 is used is shown by a solid line, and the noise level when the vibration isolating magnet 38 is removed is shown by a broken line. From FIG. 8, 2 kH is obtained by using the anti-vibration magnet 38.
It can be seen that there is a noise reduction effect in the frequency range around z.

Particularly, in this structure, the vibration-proof magnet 38 is used.
Since the rubber magnet is used as the rubber magnet, it is possible to prevent the vibration isolating magnet 38 from being damaged by hitting a protrusion or the like existing on the outer surface of the terminal box 23. Further, even if the vibration-proof magnet 38 is damaged, the heat-sensitive surface 31a of the bimetal element 31 is broken by the fragments.
Does not deform, it is possible to avoid the inconvenience that the operating temperature changes.

Further, since the thickness dimension of the vibration isolating magnet 38 is configured to be substantially equal to the gap dimension between the heat sensitive surface 31a and the outer surface of the terminal box 23, the compressor 2
Even when the anti-vibration magnet 38 is attracted to the outer surface of the terminal box 23 away from the heat-sensitive surface 31a under the vibration of 2,
The decrease in the magnetic attraction force acting on the bimetal plate 31c is small. Further, when the magnetic attraction force between the vibration isolating magnet 38 and the bimetal plate 31c is weak, or when the magnetic attraction force decreases over time, the double-sided magnetizing type vibration isolating magnet 38 is used instead of the single-sided magnetization. It is effective to use the type of anti-vibration magnet 38a. Since the surface of the vibration isolating magnet 38a that faces the terminal box 23 is not magnetized, the attractive force between the vibration isolating magnet 38a and the terminal box 23 is small, and the vibration isolating magnet 38a does not contact the heat sensitive surface 31a. It becomes easier to maintain the state of close contact. As a result, the bimetal plate 31c
The vibration suppressing effect, that is, the noise suppressing effect can be maintained at a high level.

Since a weak magnetic force may remain on the non-magnetized surface of the anti-vibration magnet 38a, the magnetized surface and the non-magnetized surface may be colored in different colors, or both surfaces of the magnetized surface may be colored. It is advisable to attach a tape so that both sides can be easily identified. As a result, there is no risk of mistaking the magnetized surface and the non-magnetized surface when the compressor power supply device 21 is assembled.

The assembling work of the compressor power supply device 21 can be carried out not in a place where the compressor 22 is installed, for example, in a refrigerator machine room, but in an assembling line or the like, and the work is performed by a mounting holder holding a bimetal element 31. After setting 34 at a predetermined position, the cluster 32 is simply fixed along the guide portion 34h of the attachment holder 34 by the engaging claws 30m and 30n. In particular, the provision of the guide portion 34h facilitates the work of attaching the cluster 32. Therefore, the labor of the operator can be greatly reduced, work efficiency can be improved, and the cluster 32 and the bimetal element 31 can be improved.
It becomes easy to arrange all of them in a compact manner, and as a result, it is possible to downsize the compressor power supply device 21.

Further, since the engaging claws 30m and 30n and the cover pressing spring 33 are surely fixed, and the claw portion 30q is engaged with the terminal box 23,
Even when an external force is applied to the bimetal element 31, the cluster 32, or the like via the terminal cover 30, or the lead wires 36, 37, poor contact between the cluster 32 and the three-core terminal 25, displacement of the heat-sensitive surface 31a, floating, etc. Can be prevented. Further, the claw portion 30q provides a feeling of attachment when the compressor power supply device 21 is attached to the terminal box 23.

The overheat protection by the bimetal element 31 does not aim at protection by a transient temperature rise, but at the purpose of preventing deterioration of oil or the like of the compressor 22 which gradually progresses for several thousand hours. Therefore, the anti-vibration magnet 3
The delay in temperature detection due to 8 is not a problem,
Rather, it is possible to suppress the operation of the bimetal element 31 due to momentary overheating, and avoid frequent operation stoppages of the refrigerator.

In the above structure, the mounting holder 34
Was fixed by sandwiching the arm portion 34a between the top of the base portion 30k and the cluster 32, but instead of this, a configuration as shown in an exploded perspective view in FIG. 9 may be used. That is, the slit 30 in the terminal cover 30.
A retaining projection 30r is integrally provided on one end surface of b on the opening side, and a step portion 34i is provided on the mounting holder 34 above the fitting groove 34e and engageable with the retaining projection 30r. . According to this configuration, the closing portion 3 of the mounting holder 34
When the slit 30b is closed while sliding the fitting groove 34e provided in 4c with the one end surface of the slit 30b, the upper surface of the flange portion 34d is finally the terminal box of the terminal cover 30. The retaining projection 30r and the step portion 34i engage with each other at a position where they are flush with the contact surface, and the mounting holder 34 is fixed. Therefore, the arm portion 34a
Is unnecessary, and even if the lead wire 36 is pulled, the attachment holder 34 can be more reliably prevented from floating.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. In addition, in FIG. 10, the same components as those in FIG.
Only different components will be described below. Figure 10
It is a longitudinal cross-sectional view showing a state in which the compressor power supply device 39 is attached to, for example, the compressor 22 for a refrigerator. In FIG. 10, the flange portion 34 of the mounting holder 34 'is
The d'is formed so that its thickness dimension continuously changes over one turn. Then, the flange portion 34d '
Of these, the side to which the support plate portion 34g is attached (the upper side in FIG. 10) is the thinnest, and the opposite side (the lower side in FIG. 10) is the thickest. Also, to match this,
The top portion of the base portion 30h 'provided on the bottom portion of the terminal cover 30 is also configured to be inclined with respect to the bottom surface of the terminal cover 30'.

According to this structure, when the compressor power supply device 39 is attached to the compressor 22, the bimetal element 31 is fixed such that its heat-sensitive surface 31a is inclined downward with respect to the vertical plane. On the other hand, bimetal element 3
In 1, the bimetal plate 31c is arranged in parallel with the heat-sensitive surface 31a (see FIG. 12 (a)). Therefore, the self-weight of the bimetal plate 31c is applied not only to the peripheral portion of the bimetal plate 31c but also to the contact point between the bimetal plate 31c and the heat-sensitive surface (the surface on the inner side of the bimetal element 31). As a result, the vibration of the bimetal plate 31c is suppressed by the frictional force acting on the contact portion during the operation of the compressor 22, and the generation of abnormal noise can be suppressed.

(Other Embodiments) The present invention is not limited to the embodiments described above and shown in the drawings.
For example, it may be configured as follows. In the second embodiment, the bimetal element 31 may be arranged so that the heat-sensitive surface 31a is inclined upward with respect to the vertical plane.

The bimetal element 31 includes a bimetal plate 31 when the temperature of the heat sensitive surface 31a is lower than a predetermined operating temperature.
c is convexly warped in the direction of the guide pin (see FIG. 12), and when the temperature of the heat sensitive surface 31a is equal to or higher than the operating temperature, the bimetal plate 31c is convexly warped in the direction of the heat sensitive surface 31a. It may be a type. In this case, the bimetal plate 31c is likely to vibrate only when the temperature of the heat-sensitive surface 31a exceeds the operating temperature. Even in this state, by using the vibration isolating magnet 38 or by tilting the heat-sensitive surface 31a with respect to the vertical plane, it is possible to prevent generation of abnormal noise from the bimetal element 31 due to the vibration of the compressor 22.

[0049]

Since the present invention is as described above,
It has the following effects. According to the power supply device for a compressor of claim 1, since the vibration isolating magnet is arranged between the heat-sensitive surface of the bimetal element and the outer surface of the compressor in a state of being attached to the compressor, the bimetal plate in the bimetal element is vibration-proof. It is regulated so that it is attracted to the magnet for use and pressed against the heat-sensitive surface. As a result, vibration of the bimetal plate is suppressed even when the compressor is operated, and generation of abnormal noise can be prevented.

According to the compressor power supply device of the second aspect, since the anti-vibration magnet is arranged in close contact with the heat-sensitive surface of the bimetal element, a large magnetic attraction force acts on the bimetal plate to suppress abnormal noise. The effect is enhanced. According to the compressor power supply device of claim 3, the thickness of the vibration isolating magnet is set to be substantially equal to the gap between the heat-sensitive surface of the bimetal element and the outer surface of the compressor. Even if it is displaced from the arrangement position, the effect of suppressing abnormal noise can be maintained.

According to the compressor power supply device of the fourth aspect, since the vibration isolating magnet is constituted by the rubber magnet, the vibration isolating magnet is less likely to be damaged, and even if it is damaged, the heat-sensitive surface of the bimetal element can be prevented. It is possible to prevent deformation and avoid changes in its operating temperature.

According to the compressor power supply device of the present invention, since the vibration isolating magnet is composed of a single-sided magnetizing magnet having the magnetizing surface on the thermosensitive surface side of the bimetal element, the vibration isolating magnet is a thermosensitive surface. It is possible to prevent the effect of suppressing abnormal noise from being lowered due to moving away from the compressor to the compressor side.

According to the compressor power supply device of the eighth aspect, since the bimetal element is attached to the compressor so that the heat-sensitive surface of the bimetal element is tilted with respect to the vertical plane, the bimetal plate and the heat-sensitive surface are separated from each other. Friction force acts between. As a result, the vibration of the bimetal plate during the operation of the compressor is suppressed, and the generation of abnormal noise can be suppressed.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a compressor mounting state of a compressor power supply device according to a first embodiment of the present invention.

FIG. 2 is a rear view of the compressor power supply device.

FIG. 3 is a perspective view of a power supply device for a compressor.

FIG. 4 is a side view showing the compressor power supply device partially broken away.

FIG. 5 is a front view of the terminal cover.

FIG. 6 is a perspective view of a mounting holder.

FIG. 7 is a diagram showing a magnetized state of a vibration isolating magnet.

FIG. 8 Frequency analysis diagram of noise level

FIG. 9 is an exploded perspective view showing how the mounting holder is mounted on the terminal cover.

FIG. 10 is a view corresponding to FIG. 1 showing a second embodiment.

FIG. 11 is an exploded perspective view showing a conventional example.

FIG. 12 is a longitudinal sectional view (a) of the bimetal element and a transverse sectional view (b) thereof taken along the line AA.

[Explanation of symbols]

21 and 39 are power supply devices for compressors, 22 is a compressor, 24 is a terminal block, 25 is a 3-core terminal (power supply terminal), 3
Reference numeral 0 is a terminal cover, 31 is a bimetal element, 31a is a heat-sensitive surface, 31c is a bimetal plate, 32 is a cluster (power supply connector), and 38 is a vibration isolating magnet.

Front page continuation (72) Inventor Nobumitsu Sato 1-6 Ota-Toshiba-cho, Ibaraki-shi, Osaka Toshiba A ・ V ・ E Co., Ltd. Osaka Office (56) Reference JP 62-9164 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F04B 39/00 106

Claims (8)

(57) [Claims] 1. A bottomed container having an opening,
A terminal cover attached to the compressor so that the opening is closed, and a heat-sensitive surface is formed in the vicinity of the bimetal plate so that the heat-sensitive surface faces the outer surface of the compressor. A bimetal element held in the terminal cover, and electrically connected to a power supply terminal provided in a terminal block included in the compressor in a state of being housed in the terminal cover and attached to the compressor. In a compressor power supply device including a power supply connector that is in a closed state, between a heat-sensitive surface of the bimetal element and an outer surface of the compressor with a terminal cover holding the bimetal element attached to the compressor. A compressor characterized in that it is provided with an anti-vibration magnet that is fixed in a sandwiched position. Support for the power supply device. 2. The anti-vibration magnet is arranged in close contact with the heat-sensitive surface of the bimetal element.
Power supply device for the compressor described. 3. The thickness dimension of the anti-vibration magnet is set to be substantially equal to the dimension of the gap between the heat sensitive surface of the bimetal element and the outer surface of the compressor. Power supply device for compressor. 4. The power supply device for a compressor according to claim 1, wherein the anti-vibration magnet is composed of a rubber magnet. 5. The anti-vibration magnet is composed of a single-sided magnetized magnet whose magnetizing surface is a surface in close contact with the heat-sensitive surface of the bimetal element. Power supply device for compressor. 6. The anti-vibration magnet has a magnetized surface and a non-magnetized surface that are colored in different colors.
Power supply device for the compressor described. 7. The power supply device for a compressor according to claim 5, wherein the anti-vibration magnet has a double-sided tape attached to its magnetized surface. 8. A bottomed container having an opening,
A terminal cover attached to the compressor so that the opening is closed, and a heat-sensitive surface is formed in the vicinity of the bimetal plate so that the heat-sensitive surface faces the outer surface of the compressor. A bimetal element held in the terminal cover, and electrically connected to a power supply terminal provided in a terminal block included in the compressor in a state of being housed in the terminal cover and attached to the compressor. In a compressor power supply device including a power supply connector that is in a closed state, the bimetal element is such that the heat-sensitive surface is tilted with respect to a vertical plane in a state where the terminal cover is attached to the compressor. A power supply device for a compressor, which is held in the terminal cover.